Apply Ruff formatting

Author: Dreamstick9

src/typecode/contenttype.py

@@ -364,8 +364,8 @@ def is_binary(self):
                 self._is_binary = is_binary(self.location)
                 if not self._is_binary:
                     try:
-                        with open(self.location, 'rb') as f:
-                            if f.read(5) == b'%PDF-':
+                        with open(self.location, "rb") as f:
+                            if f.read(5) == b"%PDF-":
                                 self._is_binary = True
                     except Exception:
                         pass

tests/test_contenttype.py

@@ -398,7 +398,7 @@ def test_size(self):
 
     def test_is_binary_handles_pdf_signature(self):
         test_dir = self.get_temp_dir()
-        test_file = os.path.join(test_dir, 'test_pdf.pdf')
-        with open(test_file, 'wb') as f:
-            f.write(b'%PDF-1.4\nSome binary content \x00\xff')
-        assert is_binary(test_file) is True
+        test_file = os.path.join(test_dir, "test_pdf.pdf")
+        with open(test_file, "wb") as f:
+            f.write(b"%PDF-1.4\nSome binary content \x00\xff")
+        assert is_binary(test_file) is True